Evolution of the charge density wave superstructure in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>ZrTe</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>under pressure

Hoesch, Moritz; Garbarino, Gastón; Battaglia, Corsin; Aebi, Philipp; Berger, H.

doi:10.1103/physrevb.93.125102

Cited by 25 publications

(33 citation statements)

References 26 publications

(32 reference statements)

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“…4b is different from this but Se could act as a chemical pressure due to its smaller size. Therefore slight increase in band filling of the quasi-1D Fermi surface sheet seen in pure ZrTe 3 under pressure could be the mechanism for the in-plane anisotropy and promotion of SC 29 . However, due to very small Se content (up to about 3 atomic %) and no appreciable change in the unit cell parameters, this would imply strong sensitivity of CDW to substitutions on Te site and possibly to disorder.…”

Section: Discussionmentioning

confidence: 95%

Superconductivity and Charge Density Wave in ZrTe3−xSex

Zhu¹,

Ning²,

Li³

et al. 2016

Sci Rep

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Charge density wave (CDW), the periodic modulation of the electronic charge density, will open a gap on the Fermi surface that commonly leads to decreased or vanishing conductivity. On the other hand superconductivity, a commonly believed competing order, features a Fermi surface gap that results in infinite conductivity. Here we report that superconductivity emerges upon Se doping in CDW conductor ZrTe3 when the long range CDW order is gradually suppressed. Superconducting critical temperature Tc(x) in ZrTe3−xSex (0 ≤ x ≤ 0.1) increases up to 4 K plateau for 0.04 ≤ x ≤ 0.07. Further increase in Se content results in diminishing Tc and filametary superconductivity. The CDW modes from Raman spectra are observed in x = 0.04 and 0.1 crystals, where signature of ZrTe3 CDW order in resistivity vanishes. The electronic-scattering for high Tc crystals is dominated by local CDW fluctuations at high temperatures, the resistivity is linear up to highest measured T = 300 K and contributes to substantial in-plane anisotropy.

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Section: Discussionmentioning

confidence: 95%

Superconductivity and Charge Density Wave in ZrTe3−xSex

Zhu¹,

Ning²,

Li³

et al. 2016

Sci Rep

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“…This is also supported by the evolution of q CDW , which remains constant rather than changing as under hydrostatic pressure. 5 The Ni site is unambiguously identified as an intercalation site in the van-der-Waals gap with a five-fold coordinated site directly above a Zr atom being energetically favourable over a similar site above a link between (ZrTe 3 ) ∞ chains.…”

Section: Discussionmentioning

confidence: 99%

“…Our data show furthermore that the modulation q CDW is not changing with Ni content, while a rotation and change of size of q CDW was observed under hydrostatic pressure. 5 The small change of lattice constant (∼ +0.3% of unit cell volume change), compared to −8% up to 5 GPa pressure, is indicative that chemical pressure plays a minor role in the quenching of the CDW. Instead the local buckling of the Te sheet close to the van-der-Waals gap, adjacent to the Ni defect [ Fig.3(b)] is likely to have a strong effect on the long range order of the CDW by pinning.…”

Section: Discussionmentioning

confidence: 99%

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Local corrugation and persistent charge density wave in ZrTe3 with Ni intercalation

et al. 2018

Self Cite

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The mechanism of emergent bulk superconductivity in transition metal intercalated ZrTe3 is investigated by studying the effect of Ni doping on the band structure and charge density wave (CDW). The study reports theoretical and experimental results in the range of Ni0.01ZrTe3 to Ni0.05ZrTe3. In the highest doped samples bulk superconductivity with Tc < TCDW is observed, while TCDW is strongly reduced. Relativistic ab-initio calculations reveal Ni incorporation occurs preferentially through intercalation in the van-der-Waals gap. Analysis of the structural and electronic effects of intercalation, indicate buckling of the Te-sheets adjacent to the Ni site akin to a locally stabilised CDW-like lattice distortion. Experiments by low temperature x-ray diffraction, angle-resolved-photoemission spectroscopy (ARPES) as well as temperature dependent resistivity reveal the nearly unchanged persistence of the CDW into the regime of bulk superconductivity. The CDW gap is found to be unchanged in its extent in momentum space, with the gap size also unchanged or possibly slightly reduced on Ni intercalation. Both experimental observations suggest that superconductivity coexists with the CDW in NixZrTe3.

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“…This scenario suggests that the compression-induced disorder destroys the perfection of Fermi surface nesting and suppresses the CDW. [34,35] As shown in Figure 3b, the resistive superconducting transition demonstrates an anomalous two-step feature with T 1 and T 2 being the onset critical temperatures of the two steps, respectively. To gain insight into the two-step resistive superconducting transition, we measured R(T) in different magnetic fields, µ 0 H (Figure 3c).…”

mentioning

confidence: 93%

Long‐Range Ordered Amorphous Atomic Chains as Building Blocks of a Superconducting Quasi‐One‐Dimensional Crystal

Zhou

Chen

et al. 2020

Advanced Materials

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Crystalline and amorphous structures are two of the most common solid‐state phases. Crystals having orientational and periodic translation symmetries are usually both short‐range and long‐range ordered, while amorphous materials have no long‐range order. Short‐range ordered but long‐range disordered materials are generally categorized into amorphous phases. In contrast to the extensively studied crystalline and amorphous phases, the combination of short‐range disordered and long‐range ordered structures at the atomic level is extremely rare and so far has only been reported for solvated fullerenes under compression. Here, a report on the creation and investigation of a superconducting quasi‐1D material with long‐range ordered amorphous building blocks is presented. Using a diamond anvil cell, monocrystalline (TaSe4)2I is compressed and a system is created where the TaSe4 atomic chains are in amorphous state without breaking the orientational and periodic translation symmetries of the chain lattice. Strikingly, along with the amorphization of the atomic chains, the insulating (TaSe4)2I becomes a superconductor. The data provide critical insight into a new phase of solid‐state materials. The findings demonstrate a first ever case where superconductivity is hosted by a lattice with periodic but amorphous constituent atomic chains.

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Evolution of the charge density wave superstructure inZrTe3under pressure

Cited by 25 publications

References 26 publications

Superconductivity and Charge Density Wave in ZrTe3−xSex

Superconductivity and Charge Density Wave in ZrTe3−xSex

Local corrugation and persistent charge density wave in ZrTe3 with Ni intercalation

Long‐Range Ordered Amorphous Atomic Chains as Building Blocks of a Superconducting Quasi‐One‐Dimensional Crystal

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